Improvement in locks



a ments in Locks, of which anni smc f anni dimm.

Letters Patent No. 98,57 7, cla-ted January 4, 1870.

IMPROVEMENT IN LocKs.

The Schedule referred to in these Letters Patent and making part of the same.

I', EDWARD FAY, of thc city of' Vashington, and District of Columbia, have inventedcertainf Improvethe following is the specification.

The nature of my invention is such that it is rendered perfectly burglar-proof, incapable of being picked from the outside, while it can be locked, when placed upon a door, either on the outside or inside of said door, the bolts having no communication with each other, as will be presentlydescribed. t

The object attained is to give greater security than is now derived from the locksin use.

Figure l is'an inside View of the lock, showing the actuating-devices in position.;

Figure 2 is an inside view of the lock-cover; -Y

Figure 3 is a transverseriew of bolt, secured by a pin, and resting upon the spring and Figure 4 is the key. v

A A are the frame or sides of the lock, constructed in the usual manner;

B B' are 'the front and back pieces, connect-ed to-` gether with screws, also in the manner ordinarily used; t

C O are the bolts for locking the door-one at the bottom, and the other at the top of the lock;

D D are the standards, upon which the hollow key works in locking or unlocking; and

E is the key, made hollow a sufficient distance from the end, and surrounded, near its lower end, with a series lof cogs, to t into corresponding serrations in bolts C C. -i

K isthe knob of thedoor.

a a are springs, made of' metal, and-fastened to the side pieces, and having on their extremity, near the standard D,'for the insertion of the key, a pin, t', to

catch in the holes, b and e, in.bolts C O,'when said bolts are operated by the key, in the'` manner to be presently described.

d d are buttons, on which the bolts rest; and, as the bolts are moved with the key, these buttons always appear in the slots of the bolts to the distance at which the bolts are thrust out and in.

e e are the slots in` bolts G O, thatuiove upon the buttons (l d, when the lock is operated.

ff are the serrated edges ot' the bolts, corresponding to the circular cogs ot' the key E.

h is the hole, and a g, the pin to be inserted therein, so as to prevent the lock or bolt from being moved from the outside.

The operation of this lock is ns follows:

The hollow key, with its rim near the extremity cogged, is entered upon one of the standards D D, and,.coming in contact with the spring a, said spring is forccddownward, and the pin fi, on the spring a, is

also forced downward out of one of the holes in the bolt. i

The bolt is thus released, and, by turning the key, the cogs on the rim engage in the serra-tions in the side oi' the bolt, and the latter is forced out a suih cient distance, when the pressure upon the key is, taken oii', and the pin i on the spring enters another vhole in the bolt, and thus the bolt is securely held in its place.

To unlock the door, the key is inserted in the same manner, turned reversely, and the bolt is rc#- leased.

The advantage of having two bolts-one to lock on the outside, and one on the inside-will he seen,

i as it obviates the necessity of having a key-hole clear through the lock, and it is, therefore, less Vliable to be tampered with, and could not be pickedf for the reason, that when locked on the inside, and there being no communication. between the bolts, it would be impossible for any oneonthe outside to get at the key-hole, by means of which the door was locked on the inside; audit also obviates-the necessity of having a bolt on the inside of the door, also render-` ing it an impossibility for burglars to insert instruments from the outside, through the key-hole, in order to draw back a bolt on the door, in case any should be there, as they do with ordinary locks.

`When in a room, and the door locked by the bolt that locks on the inside, to prevent any one on the `outside from turning or locking the outside bolt with even a key `suited for the purpose, a pin, g, is inserted in the hole h, which prevents the outside bolt from being turned.

The employment of a cogged key to operate the bolts, and iitting into corresponding serrations in the bolt-s, when the spring under the bolts is released by the key, 'renders the use of a key of this kind much easier than those now used, and the security afforded by meansv of -the catch 'engaging in holes set apartat One of the keyholes,'M, of this lock is repre 'sented in the drawings with its edge notched, to correspond'with the notched rim of the key E. .Vi/hen so formed, the key may be readily inserted, and, when slightly turned, may be retained :in the lock, while, when the key is out of the lock, the diculty of picking it is increased.

A partition, N, is also shown in the drawings, between the upper and lower bolts, which prevents either bolt from being picked through the key-hole of the other` a I claim, as my invention- 1; The construction of the lock A, when ithas combined within its .framethe double bolts-C C and catch or knob K,zu1d each sepa-rated from' the other by means of the partitions N N, when sztid bolts are operated upon by means ofthe key E, having upon or near its end cogs or teeth, that meshA or t into corresponding cogs or teeth ff, formed upon the bolts C' C, and when said bolts re retained-or secured in a looked or unlocked position by means ot' the pini,

fitting into the holes c c, in the manner and for the purpose herein described.

2. The combination and-arrangement of the spring a, having upon its free end the pin i, with the ward of the lock, the bolt or bolts G C, their holes c c, to receive said pin, and the key E, in the manner and for the'purpose herein described.

' EDWARD FAY.

Witnesses Jos. COOMBS, WM. W. ALEXANDER. 

